Renormalization group study of the standard model and its extensions: The minimal supersymmetric standard model

D. J. Castaño, E. J. Piard, and P. Ramond
Phys. Rev. D 49, 4882 – Published 1 May 1994
PDFExport Citation

Abstract

In this paper we summarize the minimal supersymmetric standard model as well as the renormalization group equations of its parameters. We proceed to examine the feasibility of the model when the breaking of supersymmetry is parametrized by the soft terms suggested by supergravity theories. In such models, the electroweak symmetry is exact at the tree level and is broken spontaneously at one-loop order. We make the additional assumption that the GUT-inspired relation mb=mτ be valid at the scale where the gauge coupling constants unify, which constrains the value of the top quark mass. For all types of soft breaking terms expected in supergravity theories, we present the results of numerical runs which yield electroweak breaking at the required scale. These yield not only the allowed ranges for the soft supersymmetry breaking parameters, but also the value of the supersymmetric partners' masses. Taking mb=mτ at the unification scale, mb=4.9 GeV, and α3(MZ)=0.118, we find that for models in which global supersymmetry breaking arises solely from soft gaugino masses and bilinear mixing between the two Higgs scalars the top quark mass can be no lighter than ∼ 180 GeV.

  • Received 25 August 1993

DOI:https://doi.org/10.1103/PhysRevD.49.4882

©1994 American Physical Society

Authors & Affiliations

D. J. Castaño*, E. J. Piard, and P. Ramond

  • Institute for Fundamental Theory, Department of Physics, University of Florida, Gainesville, Florida 32611

  • *Present address: M.I.T., Center for Theoretical Physics, Cambridge, MA 02139. Electronic address: castano@pierre.mit.edu
  • Present address: University of Virginia, Department of Physics, Charlottesville, VA 22901. Electronic address: ejp4c@fermi.clas.virginia.edu
  • Electronic address: ramond@phys.ufl.edu

References (Subscription Required)

Click to Expand
Issue

Vol. 49, Iss. 9 — 1 May 1994

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×